Magneto-luminescent zinc/iron oxide core-shell nanoparticles with tunable magnetic properties

Reaz, Mahmud; Haque, Ariful; Cornelison, D. M.; Wanekaya, Adam K.; Delong, Robert K.; Ghosh, K.

doi:10.1016/j.physe.2020.114090

Cited by 19 publications

(16 citation statements)

References 39 publications

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“…Iron oxides in the surface of CSNP are well suited for structural modification to achieve desired ferromagnetic, ferromagnetic, and antiferromagnetic properties. Iron oxide phases [33] Previous studies on cobalt oxides (0.5-3 nm thick), which are transition metal oxides, magnetic, and structurally similar to iron oxides, showed annealing reduction-mediated modulation in magnetic field [34]. Changes in the magnetic property for cobalt oxides were achieved by the structural phase transition, which occurred under reduction annealing in high vacuum.…”

Section: Implication Of the Resultsmentioning

confidence: 99%

Synthesis, Characterization, and Optimization of Magnetoelectric BaTiO3–Iron Oxide Core–Shell Nanoparticles

2020

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Improvement of magnetic, electronic, optical, and catalytic properties in cutting-edge technologies including drug delivery, energy storage, magnetic transistor, and spintronics requires novel nanomaterials. This article discusses the unique, clean, and homogeneous physiochemical synthesis of BaTiO3/iron oxide core–shell nanoparticles with interfaces between ferroelectric and ferromagnetic materials. High-resolution transmission electron microscopy displayed the distinguished disparity between the core and shell of the synthesized nanoparticles. Elemental mapping and line scan confirmed the formation of the core–shell structure. Energy-dispersive X-ray spectroscopy and X-ray photoelectron spectroscopy detected the surface iron oxide phase as maghemite. Rietveld analysis of the X-ray diffraction data labeled the crystallinity and phase purity. This study provides a promising platform for the desirable property development of the futuristic multifunctional nanodevices.

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Section: Implication Of the Resultsmentioning

confidence: 99%

Synthesis, Characterization, and Optimization of Magnetoelectric BaTiO3–Iron Oxide Core–Shell Nanoparticles

2020

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“… 11 Synthetic methods for shape-controlled nanorod (NR) morphologies defined percentage (1, 3, 5 and 10%) iron or manganese into zinc oxide or sulfide were also recently described. 10 , 12 , 13 Cysteine capping of Mn/ZnS was accomplished as follows. The MnZnS pellet was ground to create a fine powder.…”

Section: Methodsmentioning

confidence: 99%

Enzyme Nanoscale Interactions with Manganese Zinc Sulfide Give Insight into Potential Antiviral Mechanisms and SARS-CoV-2 Inhibition

Delong

Huber

Aparicio-Lopez

et al. 2022

ACS Pharmacol. Transl. Sci.

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Recent interest in nanomedicine has skyrocketed because of mRNA vaccine lipid nanoparticles (LNPs) against COVID-19. Ironically, despite this success, the innovative nexus between nanotechnology and biochemistry, and the impact of nanoparticles on enzyme biochemical activity is poorly understood. The studies of this group on zinc nanoparticle (ZNP) compositions suggest that nanorod morphologies are preferred and that ZNP doped with manganese or iron can increase activity against model enzymes such as luciferase, DNA polymerase, and β-galactosidase (β-Gal), with the latter previously being associated with antimicrobial activity. SARS-CoV-2 encodes several of these types of oxido-reductase, polymerase, or hydrolase types of enzymes, and while metamaterials or nanoparticle composites have become important in many fields, their application against SARS-CoV-2 has only recently been considered. Recently, this group discovered the antiviral activity of manganese-doped zinc sulfide (MnZnS), and here the interactions of this nanoparticle composite with β-Gal, angiotensin converting enzyme (ACE), and human ACE2 (hACE2), the SARS-CoV-2 receptor, are demonstrated. Low UV, circular dichroism, and zeta potential results confirm their enzyme interaction and inhibition by fluorometric area under the curve (AUC) measurements. The IC 50 of enzyme activity varied depending on the manganese percentage and surface ranging from 20 to 50 μg/mL. MnZnS NPs give a 1–2 log order inhibition of SARS-CoV-2; however, surface-capping with cysteine does not improve activity. These data suggest that Mn substituted ZNP interactions to hACE2 and potentially other enzymes may underlie its antiviral activity, opening up a new area of pharmacology ready for preclinical translation.

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“…XRD and XPS Analysis: Structural characterization of the ultrafine coating of atomic sizes has not been easy with techniques such as XRD and XPS owing the the existence of ChemistrySelect nano-crystallites, and also due to the the relatively limited number (as low as 1-4 %) of the shell phase atoms. [27] XRD and XPS analyzes were performed to examine the differences in the structural analysis of the synthesized magnetic fluorescent NPs. X-ray diffraction (XRD) measurements were used to examine the crystal structure of CdSe/ZnS QDs.…”

Section: Chemistryselectmentioning

confidence: 99%

Superior CdSe/ZnS@Fe₂O₃ Yolk‐Shell Nanoparticles as Optically Active MRI Contrast Agents**

Ekici

Mutlugün

2022

ChemistrySelect

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We have developed a robust synthesis methodology for quantum dots (QDs) nanoparticles with magnetic properties designed for biomodal imaging. These nanocrsytlas consists of a semiconductor quantum dot core with engineered fluorescence, which is located in a paramagnetic iron oxide shell that acts as a magnetic resonance imaging (MRI) contrast agent. Yolk-shell CdSe/ZnS@Fe 2 O 3 nanoparticles (NPs) are synthesized via sonochemical decomposition of iron pentacarbonyl (Fe(CO) 5 ) using the oleylamine (OAm) as the ligand. The sonochemical synthesis method of magnetic fluorescent NPs that can be used as MRI contrast agents provided advantages such as improved quantum efficiency and homogeneous size distributions. It has been determined that the luminescence efficiency of quantum dots decreases in coatings that can be made at high temperatures by thermal decomposition. In order to eliminate the disadvantage of elevated temperatures, the sonochemical decomposition method, which allows coating at low temperatures, has been used. With this method, yolk-shell (CdSe/ZnS@Fe 2 O 3 ) nanoparticles were produced with high photoluminescence quantum efficiency and homogeneous size distributions. The synthesis magnetic fluorescent NPs optimized was determined to have the injection temperature of Fe(CO) 5 at 60 °C, Fe(CO) 5 /CdSe@ZnS ratio 0.7, OAm/Fe(CO) 5 volume ratio 1.43 with an oxidation time 5 min. Under these conditions, the quantum efficiency was found to be 78 %, nanoparticle sizes between 11-14 nm and r 1 value was 0.199, r 2 value was 0.518 in MRI analysis. These optically active magnetic fluorescent nanoparticles as positive contrast agents (T1 weighted) are predicted to pave the way for the future of advanced bioimaging systems.

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Magneto-luminescent zinc/iron oxide core-shell nanoparticles with tunable magnetic properties

Cited by 19 publications

References 39 publications

Synthesis, Characterization, and Optimization of Magnetoelectric BaTiO3–Iron Oxide Core–Shell Nanoparticles

Synthesis, Characterization, and Optimization of Magnetoelectric BaTiO3–Iron Oxide Core–Shell Nanoparticles

Enzyme Nanoscale Interactions with Manganese Zinc Sulfide Give Insight into Potential Antiviral Mechanisms and SARS-CoV-2 Inhibition

Superior CdSe/ZnS@Fe₂O₃ Yolk‐Shell Nanoparticles as Optically Active MRI Contrast Agents**

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Magneto-luminescent zinc/iron oxide core-shell nanoparticles with tunable magnetic properties

Cited by 19 publications

References 39 publications

Synthesis, Characterization, and Optimization of Magnetoelectric BaTiO3–Iron Oxide Core–Shell Nanoparticles

Synthesis, Characterization, and Optimization of Magnetoelectric BaTiO3–Iron Oxide Core–Shell Nanoparticles

Enzyme Nanoscale Interactions with Manganese Zinc Sulfide Give Insight into Potential Antiviral Mechanisms and SARS-CoV-2 Inhibition

Superior CdSe/ZnS@Fe2O3 Yolk‐Shell Nanoparticles as Optically Active MRI Contrast Agents**

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Product

Resources

About

Superior CdSe/ZnS@Fe₂O₃ Yolk‐Shell Nanoparticles as Optically Active MRI Contrast Agents**